1 /* 2 * Copyright (c) 1983 Eric P. Allman 3 * Copyright (c) 1988 Regents of the University of California. 4 * All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 */ 8 9 #ifndef lint 10 static char sccsid[] = "@(#)collect.c 6.15 (Berkeley) 04/30/93"; 11 #endif /* not lint */ 12 13 # include <errno.h> 14 # include "sendmail.h" 15 16 /* 17 ** COLLECT -- read & parse message header & make temp file. 18 ** 19 ** Creates a temporary file name and copies the standard 20 ** input to that file. Leading UNIX-style "From" lines are 21 ** stripped off (after important information is extracted). 22 ** 23 ** Parameters: 24 ** smtpmode -- if set, we are running SMTP: give an RFC821 25 ** style message to say we are ready to collect 26 ** input, and never ignore a single dot to mean 27 ** end of message. 28 ** requeueflag -- this message will be requeued later, so 29 ** don't do final processing on it. 30 ** e -- the current envelope. 31 ** 32 ** Returns: 33 ** none. 34 ** 35 ** Side Effects: 36 ** Temp file is created and filled. 37 ** The from person may be set. 38 */ 39 40 collect(smtpmode, requeueflag, e) 41 bool smtpmode; 42 bool requeueflag; 43 register ENVELOPE *e; 44 { 45 register FILE *tf; 46 bool ignrdot = smtpmode ? FALSE : IgnrDot; 47 char buf[MAXLINE], buf2[MAXLINE]; 48 register char *workbuf, *freebuf; 49 extern char *hvalue(); 50 extern bool isheader(), flusheol(); 51 52 /* 53 ** Create the temp file name and create the file. 54 */ 55 56 e->e_df = newstr(queuename(e, 'd')); 57 if ((tf = dfopen(e->e_df, "w")) == NULL) 58 { 59 syserr("Cannot create %s", e->e_df); 60 NoReturn = TRUE; 61 finis(); 62 } 63 (void) chmod(e->e_df, FileMode); 64 65 /* 66 ** Tell ARPANET to go ahead. 67 */ 68 69 if (smtpmode) 70 message("354 Enter mail, end with \".\" on a line by itself"); 71 72 /* 73 ** Try to read a UNIX-style From line 74 */ 75 76 if (sfgets(buf, MAXLINE, InChannel, TimeOuts.to_datablock) == NULL) 77 goto readerr; 78 fixcrlf(buf, FALSE); 79 # ifndef NOTUNIX 80 if (!SaveFrom && strncmp(buf, "From ", 5) == 0) 81 { 82 if (!flusheol(buf, InChannel)) 83 goto readerr; 84 eatfrom(buf, e); 85 if (sfgets(buf, MAXLINE, InChannel, TimeOuts.to_datablock) == NULL) 86 goto readerr; 87 fixcrlf(buf, FALSE); 88 } 89 # endif /* NOTUNIX */ 90 91 /* 92 ** Copy InChannel to temp file & do message editing. 93 ** To keep certain mailers from getting confused, 94 ** and to keep the output clean, lines that look 95 ** like UNIX "From" lines are deleted in the header. 96 */ 97 98 workbuf = buf; /* `workbuf' contains a header field */ 99 freebuf = buf2; /* `freebuf' can be used for read-ahead */ 100 for (;;) 101 { 102 char *curbuf; 103 int curbuffree; 104 register int curbuflen; 105 char *p; 106 107 /* first, see if the header is over */ 108 if (!isheader(workbuf)) 109 { 110 fixcrlf(workbuf, TRUE); 111 break; 112 } 113 114 /* if the line is too long, throw the rest away */ 115 if (!flusheol(workbuf, InChannel)) 116 goto readerr; 117 118 /* it's okay to toss '\n' now (flusheol() needed it) */ 119 fixcrlf(workbuf, TRUE); 120 121 curbuf = workbuf; 122 curbuflen = strlen(curbuf); 123 curbuffree = MAXLINE - curbuflen; 124 p = curbuf + curbuflen; 125 126 /* get the rest of this field */ 127 for (;;) 128 { 129 int clen; 130 131 if (sfgets(freebuf, MAXLINE, InChannel, TimeOuts.to_datablock) == NULL) 132 goto readerr; 133 134 /* is this a continuation line? */ 135 if (*freebuf != ' ' && *freebuf != '\t') 136 break; 137 138 if (!flusheol(freebuf, InChannel)) 139 goto readerr; 140 141 fixcrlf(freebuf, TRUE); 142 clen = strlen(freebuf) + 1; 143 144 /* if insufficient room, dynamically allocate buffer */ 145 if (clen >= curbuffree) 146 { 147 /* reallocate buffer */ 148 int nbuflen = ((p - curbuf) + clen) * 2; 149 char *nbuf = xalloc(nbuflen); 150 151 p = nbuf + curbuflen; 152 curbuffree = nbuflen - curbuflen; 153 bcopy(curbuf, nbuf, curbuflen); 154 if (curbuf != buf && curbuf != buf2) 155 free(curbuf); 156 curbuf = nbuf; 157 } 158 *p++ = '\n'; 159 bcopy(freebuf, p, clen - 1); 160 p += clen - 1; 161 curbuffree -= clen; 162 curbuflen += clen; 163 } 164 *p++ = '\0'; 165 166 e->e_msgsize += curbuflen; 167 168 /* 169 ** The working buffer now becomes the free buffer, since 170 ** the free buffer contains a new header field. 171 ** 172 ** This is premature, since we still havent called 173 ** chompheader() to process the field we just created 174 ** (so the call to chompheader() will use `freebuf'). 175 ** This convolution is necessary so that if we break out 176 ** of the loop due to H_EOH, `workbuf' will always be 177 ** the next unprocessed buffer. 178 */ 179 180 { 181 register char *tmp = workbuf; 182 workbuf = freebuf; 183 freebuf = tmp; 184 } 185 186 /* 187 ** Snarf header away. 188 */ 189 190 if (bitset(H_EOH, chompheader(curbuf, FALSE, e))) 191 break; 192 193 /* 194 ** If the buffer was dynamically allocated, free it. 195 */ 196 197 if (curbuf != buf && curbuf != buf2) 198 free(curbuf); 199 } 200 201 if (tTd(30, 1)) 202 printf("EOH\n"); 203 204 if (*workbuf == '\0') 205 { 206 /* throw away a blank line */ 207 if (sfgets(buf, MAXLINE, InChannel, TimeOuts.to_datablock) == NULL) 208 goto readerr; 209 } 210 else if (workbuf == buf2) /* guarantee `buf' contains data */ 211 (void) strcpy(buf, buf2); 212 213 /* 214 ** Collect the body of the message. 215 */ 216 217 do 218 { 219 register char *bp = buf; 220 221 fixcrlf(buf, TRUE); 222 223 /* check for end-of-message */ 224 if (!ignrdot && buf[0] == '.' && (buf[1] == '\n' || buf[1] == '\0')) 225 break; 226 227 /* check for transparent dot */ 228 if (OpMode == MD_SMTP && bp[0] == '.' && bp[1] == '.') 229 bp++; 230 231 /* 232 ** Figure message length, output the line to the temp 233 ** file, and insert a newline if missing. 234 */ 235 236 e->e_msgsize += strlen(bp) + 1; 237 fputs(bp, tf); 238 fputs("\n", tf); 239 if (ferror(tf)) 240 tferror(tf, e); 241 } while (sfgets(buf, MAXLINE, InChannel, TimeOuts.to_datablock) != NULL); 242 243 readerr: 244 if (fflush(tf) != 0) 245 tferror(tf, e); 246 (void) fclose(tf); 247 248 /* An EOF when running SMTP is an error */ 249 if ((feof(InChannel) || ferror(InChannel)) && OpMode == MD_SMTP) 250 { 251 char *host; 252 253 host = RealHostName; 254 if (host == NULL) 255 host = "localhost"; 256 257 # ifdef LOG 258 if (LogLevel > 0 && feof(InChannel)) 259 syslog(LOG_NOTICE, 260 "collect: unexpected close on connection from %s, sender=%s: %m\n", 261 host, e->e_from.q_paddr); 262 # endif 263 (feof(InChannel) ? usrerr : syserr) 264 ("451 collect: unexpected close on connection from %s, from=%s", 265 host, e->e_from.q_paddr); 266 267 /* don't return an error indication */ 268 e->e_to = NULL; 269 e->e_flags &= ~EF_FATALERRS; 270 271 /* and don't try to deliver the partial message either */ 272 finis(); 273 } 274 275 /* 276 ** Find out some information from the headers. 277 ** Examples are who is the from person & the date. 278 */ 279 280 eatheader(e, !requeueflag); 281 282 /* 283 ** Add an Apparently-To: line if we have no recipient lines. 284 */ 285 286 if (hvalue("to", e) == NULL && hvalue("cc", e) == NULL && 287 hvalue("bcc", e) == NULL && hvalue("apparently-to", e) == NULL) 288 { 289 register ADDRESS *q; 290 291 /* create an Apparently-To: field */ 292 /* that or reject the message.... */ 293 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 294 { 295 if (q->q_alias != NULL) 296 continue; 297 if (tTd(30, 3)) 298 printf("Adding Apparently-To: %s\n", q->q_paddr); 299 addheader("Apparently-To", q->q_paddr, e); 300 } 301 } 302 303 /* check for message too large */ 304 if (MaxMessageSize > 0 && e->e_msgsize > MaxMessageSize) 305 { 306 usrerr("552 Message exceeds maximum fixed size (%ld)", 307 MaxMessageSize); 308 } 309 310 if ((e->e_dfp = fopen(e->e_df, "r")) == NULL) 311 { 312 /* we haven't acked receipt yet, so just chuck this */ 313 syserr("Cannot reopen %s", e->e_df); 314 finis(); 315 } 316 } 317 /* 318 ** FLUSHEOL -- if not at EOL, throw away rest of input line. 319 ** 320 ** Parameters: 321 ** buf -- last line read in (checked for '\n'), 322 ** fp -- file to be read from. 323 ** 324 ** Returns: 325 ** FALSE on error from sfgets(), TRUE otherwise. 326 ** 327 ** Side Effects: 328 ** none. 329 */ 330 331 bool 332 flusheol(buf, fp) 333 char *buf; 334 FILE *fp; 335 { 336 register char *p = buf; 337 bool printmsg = TRUE; 338 char junkbuf[MAXLINE]; 339 extern char *sfgets(); 340 341 while (strchr(p, '\n') == NULL) 342 { 343 if (printmsg) 344 usrerr("553 header line too long"); 345 printmsg = FALSE; 346 if (sfgets(junkbuf, MAXLINE, fp, TimeOuts.to_datablock) == NULL) 347 return (FALSE); 348 p = junkbuf; 349 } 350 351 return (TRUE); 352 } 353 /* 354 ** TFERROR -- signal error on writing the temporary file. 355 ** 356 ** Parameters: 357 ** tf -- the file pointer for the temporary file. 358 ** 359 ** Returns: 360 ** none. 361 ** 362 ** Side Effects: 363 ** Gives an error message. 364 ** Arranges for following output to go elsewhere. 365 */ 366 367 tferror(tf, e) 368 FILE *tf; 369 register ENVELOPE *e; 370 { 371 if (errno == ENOSPC) 372 { 373 (void) freopen(e->e_df, "w", tf); 374 fputs("\nMAIL DELETED BECAUSE OF LACK OF DISK SPACE\n\n", tf); 375 usrerr("452 Out of disk space for temp file"); 376 } 377 else 378 syserr("collect: Cannot write %s", e->e_df); 379 (void) freopen("/dev/null", "w", tf); 380 } 381 /* 382 ** EATFROM -- chew up a UNIX style from line and process 383 ** 384 ** This does indeed make some assumptions about the format 385 ** of UNIX messages. 386 ** 387 ** Parameters: 388 ** fm -- the from line. 389 ** 390 ** Returns: 391 ** none. 392 ** 393 ** Side Effects: 394 ** extracts what information it can from the header, 395 ** such as the date. 396 */ 397 398 # ifndef NOTUNIX 399 400 char *DowList[] = 401 { 402 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL 403 }; 404 405 char *MonthList[] = 406 { 407 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 408 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", 409 NULL 410 }; 411 412 eatfrom(fm, e) 413 char *fm; 414 register ENVELOPE *e; 415 { 416 register char *p; 417 register char **dt; 418 419 if (tTd(30, 2)) 420 printf("eatfrom(%s)\n", fm); 421 422 /* find the date part */ 423 p = fm; 424 while (*p != '\0') 425 { 426 /* skip a word */ 427 while (*p != '\0' && *p != ' ') 428 p++; 429 while (*p == ' ') 430 p++; 431 if (!(isascii(*p) && isupper(*p)) || 432 p[3] != ' ' || p[13] != ':' || p[16] != ':') 433 continue; 434 435 /* we have a possible date */ 436 for (dt = DowList; *dt != NULL; dt++) 437 if (strncmp(*dt, p, 3) == 0) 438 break; 439 if (*dt == NULL) 440 continue; 441 442 for (dt = MonthList; *dt != NULL; dt++) 443 if (strncmp(*dt, &p[4], 3) == 0) 444 break; 445 if (*dt != NULL) 446 break; 447 } 448 449 if (*p != NULL) 450 { 451 char *q; 452 extern char *arpadate(); 453 454 /* we have found a date */ 455 q = xalloc(25); 456 (void) strncpy(q, p, 25); 457 q[24] = '\0'; 458 q = arpadate(q); 459 define('a', newstr(q), e); 460 } 461 } 462 463 # endif /* NOTUNIX */ 464